Anybody do this and if so, have there been any ill effects to your hair? Also, if you do this, have there been any benefits to your hair?

A couple of months ago, I did a whole head henna application then I started doing my roots every 2 weeks.

I also changed my hair routine to where I wash twice a week instead of once a week and it's now warm outside. My hair tends to grow faster during warm weather months but I think cleansing my scalp more frequently is causing it to grow faster too.

In any case, faster growth is wonderful but it is a mixed blessing in that my grays are popping up much quicker now too. I'm thinking of applying henna to roots every week (as opposed to every 2 weeks) and wanted to hear from anyone who is already doing this or has done this. Pros? Cons?

I do a prepoo with coconut oil before I henna, I shampoo with a sulfate-free clarifying shampoo and when I rinse the henna out after it has been on for several hours, I do so with conditioner only. As a result, I have never experienced any of the dryness that many complain of after a henna treatment. And it strengthens my hair as well as colors my grays a mahogany color. I also use amla in my henna mix and indigo to tone down the red color of the henna.